Hexden Channel Water Body

Poor ecological status

Attributes

  • Water Body IDGB107040019670
  • Water Body TypeRiver
  • Hydromorphological designationnot designated artificial or heavily modified
  • NGRTQ8169430698
  • Catchment area5205.131 ha
  • Length25.59 km
  • Catchment area52.051 km2
  • Surveillance Water BodyNo

Classifications

Classification Item20192022
EcologicalPoorPoor
Biological quality elementsPoorPoor
InvertebratesGoodHigh
Macrophytes and Phytobenthos CombinedPoorPoor
Macrophytes Sub ElementPoorPoor
Phytobenthos Sub ElementGoodGood
Physico-chemical quality elementsModerateModerate
Acid Neutralising CapacityHighHigh
Ammonia (Phys-Chem)HighHigh
Dissolved oxygenHighHigh
PhosphatePoorPoor
TemperatureHighHigh
pHHighHigh
Hydromorphological Supporting ElementsSupports goodSupports good
Hydrological RegimeHighHigh
MorphologySupports goodSupports good
ChemicalFailDoes not require assessment
Priority hazardous substancesFailDoes not require assessment
Benzo(a)pyreneGood
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
HexachlorobenzeneGood
HexachlorobutadieneGood
Mercury and Its CompoundsFail
Perfluorooctane sulphonate (PFOS)Good
Polybrominated diphenyl ethers (PBDE)Fail
Priority substancesGoodDoes not require assessment
Cypermethrin (Priority)Good
FluorantheneGood
Other PollutantsDoes not require assessmentDoes not require assessment

Why do all water bodies have a chemical status of fail?

Investigations into classification status

Classification ElementCycleYearStatusOutcome
Macrophytes and Phytobenthos Combined32019PoorVery certain there is a problem
Macrophytes and Phytobenthos Combined22019PoorVery certain there is a problem

Reasons for not achieving good (RNAG) and reasons for deterioration (RFD)

All reasons (RFDs and RNAGs) attributed to the classification elements in this water body.

Reason TypeSWMIActivityCategoryClassification ElementMore information
RNAGPoint sourceFarm/site infrastructureAgriculture and rural land managementMacrophytes and Phytobenthos CombinedDetails
RNAGPoint sourceSewage discharge (continuous)IndustryPhosphateDetails
RNAGPoint sourcePrivate Sewage TreatmentDomestic General PublicMacrophytes and Phytobenthos CombinedDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryMacrophytes and Phytobenthos CombinedDetails
RNAGPoint sourceSewage discharge (intermittent)Water IndustryPhosphateDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryPhosphateDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsibleMercury and Its CompoundsDetails
RNAGPoint sourcePrivate Sewage TreatmentDomestic General PublicPhosphateDetails
RNAGPoint sourceSewage discharge (continuous)IndustryMacrophytes and Phytobenthos CombinedDetails
RNAGPoint sourceFarm/site infrastructureAgriculture and rural land managementPhosphateDetails

Reasons for not achieving good status by business sector

The issues preventing waters reaching good status and the sectors identified as contributing to them. The numbers in the table are individual counts of the reasons for not achieving good status with a confidence status of 'confirmed' and 'probable', where the latest classification is less than good status. There may be more than one reason in a single water body. Note, table does not include reasons for deterioration.

Significant water management issuePhysical modificationsPollution from waste waterPollution from towns, cities and transportChanges to the natural flow and level of waterInvasive non-native speciesPollution from rural areasPollution from abandoned mines
Agriculture and rural land management0000020
Industry0200000
Mining and quarrying0000000
Navigation0000000
Urban and transport0000000
Water Industry0300000
Local & central government0000000
Domestic general public0020000
Recreation0000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation0000000
Total0520020

Objectives

Classification ItemStatusYearReasons
EcologicalModerate2015Disproportionately expensive: Disproportionate burdens;
Disproportionately expensive: Unfavourable balance of costs and benefits
Biological quality elementsGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
InvertebratesGood2015
Macrophytes and Phytobenthos CombinedGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Physico-chemical quality elementsModerate2015Disproportionately expensive: Unfavourable balance of costs and benefits
Acid Neutralising CapacityGood2015
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphatePoor2015Disproportionately expensive: Unfavourable balance of costs and benefits
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsSupports good2015
Hydrological RegimeSupports good2015
Supporting elements (Surface Water)Not assessed2015
Specific pollutantsNot assessed2015
ChemicalGood2063Natural conditions: Chemical status recovery time
Priority hazardous substancesGood2063Natural conditions: Chemical status recovery time
Benzo(a)pyreneGood2015
Dioxins and dioxin-like compoundsGood2015
Heptachlor and cis-Heptachlor epoxideGood2015
Hexabromocyclododecane (HBCDD)Good2015
HexachlorobenzeneGood2015
HexachlorobutadieneGood2015
Mercury and Its CompoundsGood2040Natural conditions: Chemical status recovery time
Perfluorooctane sulphonate (PFOS)Good2015
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
Priority substancesGood2015
Cypermethrin (Priority)Good2015
FluorantheneGood2015
Other PollutantsDoes not require assessment2015

Protected areas

PA NameIdDirectiveMore information
Hexden Channel NVZS513Nitrates Directive
Lower Rother from Robertsbridge to Iden NVZS509Nitrates Directive

Monitoring sites which have been used to classify this water body

Shows which sites were used for classification for which years within each cycle.

Monitoring SiteCycle 1Cycle 2Cycle 3
158338 1583382014, 20132016, 2015, 2014, 2013
44244 442442009, 20142016, 2015, 2014
HEXDEN CHANNEL E00017082009, 20142019, 2015, 2016, 20142022, 2019
D/S HAWKHURST SW GUN GREEN E00017092009
MAYTHAM WHARF HEXDEN CHANNEL E00017002009
202140 2021402022
43561 435612009, 20142015, 2016, 2014
D/S ROLVENDEN LAYNE SW E00017122009
ROTHER/ROTHER - MAIN RIVER/ROTHER TRIBUTARIES/HEXDEN CHANNEL/LAMBSLAND FARM (HEXDEN CHANNEL)/ 171882011, 2014, 2010, 2009
202826 2028262022
42480 424802009, 2012
3.6KM D/S IDEN GREEN STW E00017162009
HEXDEN ROAD BRIDGE A28 E00017062012, 2009, 2010, 2013, 2011, 20142015, 2019, 2016, 2013, 20142019
42124 421242012, 2009, 2010, 2011, 20142015, 2016, 2014

Upstream water bodies